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1.
Ham Radio 101: What is WSPR? (onallbands.com)
167 points by peter_d_sherman 5 months ago | 67 comments
2.
Everything you need to know to design your own CNC router (mattferraro.dev)
329 points by mferraro89 on Jan 19, 2021 | 166 comments
3.
Show HN: Gping.io – Like TinyURL for your car (gping.io)
184 points by dustball on Aug 7, 2016 | 75 comments

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